Fe(III) complexes as photocatalysts for photopolymerization reactions, hydrogels preparation and copolymerization
Palavras-chave:
iron, Schiff bases, Photocontrolled Radical Polymerization, water-soluble.Resumo
Light-activated polymerization offers a sustainable, energy-efficient alternative to conventional thermal processes by significantly reducing energy consumption. In this context, iron-based catalysts stand out for their low toxicity, affordability, natural abundance, and biocompatibility, making them excellent candidates for green photochemical applications.
This study investigates Fe(III) complexes bearing symmetric Schiff base ligands as photocatalysts for the Controlled Radical Photopolymerization (CRP2) of methyl acrylate (MA). Reactions were carried out under 365 nm LED irradiation using a tricomponent system (Fe(III), EDB, and Ph-Br), achieving efficient polymerization and good control over molecular architecture.
The water solubility of these complexes also enabled the polymerization of 2-hydroxyethyl methacrylate (HEMA), yielding hydrogels with high water content, essential features for biomedical applications.
Additionally, these systems were employed in the synthesis of block copolymers (PHEMA-β-PBA), further demonstrating the versatility of Fe(III)-based photocatalysts in the development of advanced, sustainable polymeric materials.
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